부산대학교 도서관

The current research aimed to explore the particle erosion of a die cast Al-14Si alloy, and how the particle erosion behaviour can be affected by modification of the microstructure via friction stir process. The results indicate that friction stirring of the alloy can annihilate the dendritic structure of primary α-Al, break the eutectic Si and β-Al3(Fe,Mn)Si2 particles lengthwise, cause the eutectic Si particles to become more rounded, and blend the second phase particles rather uniformly in the α-Al matrix. According to the SiO2 particle erosion test at 15 and 90° impact angles, this microstructure modification can improve the erosion resistance by not only particle reinforcement of α-Al matrix but also suppressing the susceptibility of brittle cracking of the second phase particles. [ABSTRACT FROM AUTHOR]